WO2010017684A1 - Extending ladder - Google Patents

Extending ladder Download PDF

Info

Publication number
WO2010017684A1
WO2010017684A1 PCT/CN2009/000792 CN2009000792W WO2010017684A1 WO 2010017684 A1 WO2010017684 A1 WO 2010017684A1 CN 2009000792 W CN2009000792 W CN 2009000792W WO 2010017684 A1 WO2010017684 A1 WO 2010017684A1
Authority
WO
WIPO (PCT)
Prior art keywords
crosspiece
latch
sleeve
pin
ladder
Prior art date
Application number
PCT/CN2009/000792
Other languages
French (fr)
Chinese (zh)
Inventor
王万兴
Original Assignee
Wang Wanxing
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wang Wanxing filed Critical Wang Wanxing
Priority to DK09806287.0T priority Critical patent/DK2322752T3/en
Priority to EP09806287.0A priority patent/EP2322752B1/en
Publication of WO2010017684A1 publication Critical patent/WO2010017684A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/06—Securing devices or hooks for parts of extensible ladders

Definitions

  • This invention relates to a ladder, and more particularly to an extension ladder including a plurality of ladder bars that are relatively slidable and nested together. Background technique
  • Ladders are often used when repairs or maintenance tasks occur in homes, apartments, farms, factories, and other locations. Ladders must be collected in a certain place when not in use. Longer ladders allow people to reach higher heights, but they are not easy to carry and will take up more space when they are stored. Retractable ladder
  • Two ladder rods consisting of multi-section telescopically folded joint rods, the bottom end of each joint rod being assembled inside the lower section rod;
  • each crosspiece being mounted between the opposite side rails;
  • a locking mechanism installed in the crosspiece for automatically locking the levers of the ladder rod one by one when the joint lever is deployed;
  • the feature is that the locking mechanism in the cross rail releases the connection between the upper rail and the side rails when each rail is collapsed by the folding of the ladder and touches the lower rail.
  • This patent provides the function of folding the ladder from bottom to top. Once the bottom two crosspieces are first folded, the third crosspiece is automatically folded from bottom to top, and so on until the topmost crosspiece is automatically fold.
  • this also becomes a hidden danger of using unsafe and prone to accidents, especially the damage caused by squeezing, especially when the ladder is in use, if a third party accidentally touches the switch of the lowermost crosspiece, This will cause all the crosspieces to be automatically folded, which may cause the user standing on the crossbar to fall and be injured.
  • the existing extension ladders which are capable of folding the ladders by pressing the buttons on each of the rails one at a time are safer in use.
  • U.S. Patent No. 7,404,094 B2 also discloses a telescopic ladder which is convenient and safe to use.
  • the ladder comprises: a first ladder bar, a second ladder bar and a plurality of crosspieces extending between the first ladder bar and the second ladder bar;
  • the rod includes a first joint rod and a second joint rod, the first joint rod includes an inner surface, and the second joint rod is connected to the first joint rod by a nesting manner to form a telescopic structure that can move relative to each other in the longitudinal direction;
  • a locking mechanism for selectively locking the second link rod relative to the first joint rod
  • a button operatively coupled to the locking mechanism for manipulating the locking mechanism; the button being disposed adjacent to the first node bar and having a recess adapted to the size of the thumb tip, the thumb tip being placed In the recess, the button can be pushed in the direction from the first link to the second link to cancel the locking of the second link by the locking mechanism; a sleeve is sleeved on the outer surface of the second section rod; the sleeve has an outer guiding surface in contact with the inner surface of the first section rod.
  • buttons Compared with the existing safe extension ladders, the most prominent technical features of the claims are the “buttons” and “casings”, which mainly solve the problem of how to make the button manipulation more convenient and how to reduce the adjacent node rods. Friction and wear problems.
  • the technical problem to be solved by the present invention is to provide an extension ladder which is convenient for one-hand operation of the operation button to unlock the crosspiece and the corresponding joint lever, thereby making the folding operation of the ladder more convenient.
  • the second technical problem to be solved by the present invention is to provide an extension ladder that can prevent the upper section lever from being disengaged from the next section lever when the lever is quickly pulled, and can prompt the user to pull the lever in place.
  • an extension ladder comprising two oppositely disposed left and right ladder bars, and a plurality of crosspieces disposed between the left and right ladder bars
  • the left ladder rod is composed of a plurality of sections of the telescopically folded left section poles
  • the right ladder pole is composed of a plurality of sections of the retractable right section rods
  • the crosspieces are installed on the opposite two left and right sides.
  • the left and right locking mechanisms respectively have left and right manipulation buttons; wherein: the left and right manipulation buttons are located at the central portion of the crosspiece and are arranged adjacent to each other, so that one hand can operate simultaneously. Two control buttons unlock the crosspiece and the corresponding club.
  • the above left locking mechanism further includes:
  • a left connecting sleeve connected to the left end of the crosspiece, the left connecting sleeve interconnecting the crosspiece with the upper portion of the corresponding left strut; the left latch disposed in the crosspiece, the left latch is horizontally movable relative to the crosspiece and can extend horizontally Outside the left side of the file;
  • a first spring that is sleeved on the left pin and keeps the left pin always exposed to the left outer side of the crosspiece
  • the left control button is connected to the left pin.
  • the upper portion of the left node has a first locking hole for the left pin to pass through, and the middle portion of the left bar is also provided with a left pin for insertion. Second locking hole;
  • the right locking mechanism further includes: a right connecting sleeve connected to the right end of the crosspiece, the right connecting sleeve connecting the crosspiece and the phase The upper portions of the right section rods should be connected to each other;
  • the right latch disposed in the crosspiece, the right latch is horizontally movable relative to the horizontal axis and can extend outside the right side of the crosspiece;
  • the right control button is connected to the right pin.
  • the upper portion of the right node is provided with a third locking hole for the right pin to pass through, and the middle portion of the right node is also provided with a right pin for insertion.
  • the fourth locking hole is provided.
  • the aforementioned locking mechanism involves few components, so it is a relatively simple locking mechanism.
  • the locking mechanism can also adopt various locking modes in the existing extension ladder.
  • the left side of the crosspiece has a first spring seat, the left pin is movablely passed through the first spring seat, and the first spring is disposed in the first spring seat, and the first spring is abutted Relying on the right inner wall of the first spring seat, the other end abutting against the shoulder of the middle of the left pin;
  • the right side of the crosspiece has a second spring seat, and the right pin is movable through the first
  • the second spring is disposed in the second spring seat, the second spring abuts against the left inner wall of the second spring seat, and the other end abuts against the shoulder of the middle of the right pin.
  • the spring seat not only functions to accommodate the spring, but also has the function of supporting the bolt.
  • the left side of the above-mentioned crosspiece has a left limit block, the left pin is movablely passed through the left limit block, and the left pin is fixed with two retaining rings arranged on the end face of the left limit block.
  • the two retaining rings are located on two sides of the left limiting block;
  • the right side of the crossbar has a right limiting block, and the right latch is movable through the right limiting block, and the right locking pin
  • Two spacer rings are arranged at the interval, and the two retaining rings are located on both sides of the right limiting block.
  • the structure for limiting the movement of the pin is not limited to this one, and other prior art techniques may be employed.
  • the middle portion of the outer peripheral surface of the left joint rod is provided with a left limit ring, and the left limit ring is located between two adjacent left joint rods, correspondingly,
  • the left connecting sleeve has an annular surface, and the annular surface forms a socket.
  • the socket is tightly fitted with the outer circumference of the upper portion of the left joint.
  • the upper end of the inner wall of the sleeve forms an inner shoulder that can be blocked from the left limiting ring.
  • the utility model further has a through hole for the left pin to pass through and penetrates with the socket; the middle portion of the outer peripheral surface of the right bar is sleeved with a right limiting ring, and the right limiting ring is located at two adjacent right links
  • the right connecting sleeve has an annular surface, and the annular surface forms a socket.
  • the socket is tightly fitted with the outer periphery of the upper right rod.
  • the upper end of the inner wall of the sleeve is formed with a right limiting ring.
  • the inner shoulder sleeve is provided with a through hole for the right pin to pass through and penetrate the socket.
  • the limit ring When the strut is pulled up in position, the limit ring is matched with the gear of the inner shoulder of the connecting sleeve to prevent the strut from being further pulled out, and the limit ring is blocked when the inner shoulder is blocked, that is, the strut can no longer be easily pulled. , the user is prompted: At this time, the node bar is already in place, and the lever can be stopped.
  • the manner in which the limiting ring is limited to the node bar may be as follows: the left limiting ring has a first notch opposite to the first locking hole, and the inner wall of the left limiting ring Having a plurality of convex portions, correspondingly, the middle peripheral wall of the left joint rod has a plurality of holes for the convex portions to be engaged; the right limit ring has a third locking hole And a second notch, and the inner wall of the right limiting ring has a plurality of convex portions.
  • the middle peripheral wall of the right right bar has a plurality of holes for the convex portion to be engaged.
  • the joint rod can make the limit ring convenient and securely restrained in the middle of the joint rod, and the operation causes the limit ring to be opened in the direction of the notch, the limit ring is fastened to the outer peripheral surface of the joint rod, and the convex portion is inserted into the corresponding hole. , you can install the limit ring.
  • a left sleeve is sleeved at the lower end opening of the left joint rod, and an upper outer surface of the left sleeve is in contact with an inner end surface of the left section of the lower section, and a lower outer surface of the left sleeve is tapered;
  • a right sleeve is sleeved at the lower end opening of the right joint rod, and an upper outer surface of the right sleeve is in contact with an inner end surface of the right section of the lower section, and a lower outer surface of the right sleeve is tapered.
  • the upper outer surfaces of the left and right sleeves are respectively in contact with the inner end faces of the left and right joints of the next section, thereby playing a damping role when the relative movements between the adjacent joints are relatively prevented, thereby preventing the relative movement of the joints from being too fast. Avoiding the collision between adjacent crosspieces and damaging the crosspiece, and reducing the noise caused by the collision of the crosspieces; the lower outer surface of the left and right sleeves is tapered to facilitate the previous section.
  • the pole is inserted into the next section of the pole.
  • the upper inner surface of the left sleeve has a plurality of bumps.
  • the lower peripheral wall of the left joint has a plurality of positioning holes for the bumps to be engaged; the upper portion of the right sleeve The surface has a plurality of bumps.
  • the lower peripheral wall of the right mast has a plurality of positioning holes for the bumps to be engaged.
  • the left side of the left control button has a stopper for facilitating fingertip erection; the left side of the right manipulation button has a stopper for facilitating fingertip erection.
  • the stopper is arranged on the inner side of the control button, which can reduce the operation span between the fingers, and the finger can better control the button and make the operation easier.
  • the extension ladder sets the left and right control buttons in the central part of the crosspiece and is adjacent to each other, so that only the thumbs and forefingers of the same hand are opened during operation, and the thumb is In contact with the right control button, the index finger is in contact with the left control button, and then the left and right control buttons are driven inwardly to move toward each other to operate the left and right locking mechanisms to unlock the crosspiece and the corresponding left and right joint levers.
  • the other hand that can be vacated can hold the node bar, let the node slowly move down, avoid the impact between adjacent crosspieces, and make the operation smooth.
  • FIG. 1 is a schematic perspective view of an embodiment of the present invention
  • Figure 2 is a cross-sectional view showing an embodiment of the present invention
  • Figure 3 is an enlarged view of A of Figure 2;
  • Figure 4 is an enlarged view of B of Figure 2;
  • Figure 5 is an enlarged view of the portion C of Figure 2;
  • Figure 6 is an enlarged view of D of Figure 2;
  • Figure 7 is an enlarged view of E at Figure 2;
  • Figure 8 is an enlarged view of the F of Figure 2;
  • Figure 9 is an exploded perspective view of an embodiment of the present invention.
  • FIG. 10 is a schematic view showing the installation between the limiting ring and the sleeve and the joint rod in the embodiment of the present invention. detailed description
  • FIG. 1-10 A preferred embodiment of the present invention is shown in Figures 1-10.
  • An extension ladder comprising two oppositely disposed left ladder bars 1 and right ladder bars 2, and a plurality of crosspieces 3 disposed between the left and right ladder bars 1, 2, wherein the left ladder bars 1 are
  • the telescopically folded left section bar 1 1 is sleeved in sequence to form a telescopic structure
  • the right ladder bar 2 is sequentially assembled by a plurality of sections of the telescopically folded right section bar 21 to form a telescopic structure, the left side,
  • the right section bars 11, 21 are generally tubular.
  • the crosspiece 3 is installed between the two opposite left and right joint rods 11, 21, and the crosspiece 3 has a hollow rectangular parallelepiped shape, and the crosspiece 3 is provided with a crosspiece 3 when the ladder is deployed.
  • a left locking mechanism 4 locked with the left section lever 11 of the previous section, and a right locking mechanism 5 for locking the rail 3 to the right section lever 21 of the upper section to prevent the ladder from being retracted and folded, the left and right locking mechanisms 4 And 5 respectively have left and right manipulation buttons 6, 7 for operating the two locking structures.
  • the left locking mechanism 4 further includes:
  • a left connecting sleeve 41 connected to the left end of the crosspiece 3, the left connecting sleeve 41 interconnecting the crosspiece 3 with the upper portion of the corresponding left joint rod 11;
  • the left latch 42 is horizontally movable relative to the crosspiece 3 and can extend outside the left side of the crosspiece 3;
  • the first spring 43 is sleeved on the left latch 42 and the left latch 42 is always kept exposed to the left outer side of the crosspiece 3;
  • the left side of the crosspiece 3 has a first spring seat 44.
  • the left latch 42 is movably passed through the first spring seat 44.
  • the first spring 43 is disposed in the first spring seat 44.
  • a spring 43-end abuts against the right inner wall of the first spring seat 44, and the other end abuts against the shoulder 421 of the middle of the left pin 42;
  • left limit block 45 on the left side of the crosspiece 3, the left pin 42 is movable through the left limit block 45, and the left pin 42 is fixed with two left and left limit blocks.
  • the retaining ring 46 of the 45 end face is arranged, the two retaining rings 46 are located on both sides of the left limiting block 45; the left control button 6 is connected to the left latch 42, correspondingly, the left node 11
  • the upper portion has a first locking hole 111 through which the left pin 42 passes, and the middle portion of the left node 11 is also opened for the left pin 42 to be inserted.
  • the second locking hole 112 is inserted.
  • the right locking mechanism 5 further includes:
  • the second spring 53 is disposed on the right latch 52 and keeps the right latch 52 always exposed to the outer right side of the crosspiece 3;
  • a second spring seat 54 is disposed on the right side of the crosspiece 3, and the right latch 52 is movably passed through the second spring seat 54.
  • the second spring 53 is disposed in the second spring seat 54.
  • the two springs 53 are abutted against the left inner wall of the second spring seat 54 and the other end abuts against the shoulder 521 of the middle of the right pin 52;
  • the right latch 52 is movably passed through the right limiting block 55, and two right and right limiting blocks are fixed on the right latch 52.
  • the retaining ring 56 of the end face of the 55, the two retaining rings 56 are located on both sides of the right limiting block 55; the right operating button 7 is connected to the right latch 52, correspondingly, the right node 21
  • the upper portion is provided with a third locking hole 211 through which the right pin 52 passes, and the middle portion of the right lever 21 is also provided with a fourth locking hole 212 through which the right pin 52 is inserted.
  • the left and right control buttons 6, 7 are located at the central portion of the crosspiece 3 and are disposed adjacent to each other, that is, in the middle of the crosspiece 3, there are two left and right slots 31 for the left and right manipulation buttons 6, 7 to pass through, 32, the left and right control buttons 6, 7 are respectively limited in the left and right slots 31, 32, and can be laterally moved relative to the left and right slots 31, 32, respectively, so that one hand can simultaneously operate the two control buttons 6 7, and the crosspiece 3 is unlocked with the corresponding joint levers 11, 21.
  • the right side of the left manipulation button 6 has a stopper 61 for facilitating fingertip erection; the left side of the right manipulation button 7 has a stopper 71 for facilitating fingertip erection.
  • a left limiting ring 8 is disposed in a middle portion of the outer peripheral surface of the left knuckle 11 , and the left limiting ring 8 is located between the adjacent two left knuckles 11 .
  • the left connecting sleeve 41 has an annular surface.
  • the annular surface forms a socket 411.
  • the socket 411 is tightly coupled to the outer periphery of the upper portion of the left joint rod 11 and is connected by a connecting member.
  • the upper end of the inner wall of the sleeve 411 forms an inner shoulder 412 that can be blocked from the left limiting ring 8.
  • the left connecting sleeve 41 further has a through hole 413 through which the left latch 42 passes and penetrates the socket 411.
  • the left limiting ring 8 has a first locking hole 111 opposite thereto. a first notch 81, and the inner wall of the left limiting ring 8 has a plurality of convex portions 82.
  • the central peripheral wall of the left fixed bar 11 has a plurality of holes 113 for the convex portion 82 to be engaged. .
  • a right limiting ring 9 is disposed in a middle portion of the outer peripheral surface of the right knuckle 21, and the right limiting ring 9 is located between two adjacent right knuckles 21, and correspondingly, the right connecting sleeve 51 has an annular surface.
  • the annular surface forms a socket 511.
  • the socket 511 is tightly coupled with the outer periphery of the upper right rod 21, and is connected by a connecting member.
  • the upper end of the inner wall of the socket 511 forms an inner shoulder that can be blocked from the right limiting ring 9.
  • the right connecting sleeve 51 further has a right plug 52 for passing through and a through hole 513 through which the socket 511 passes;
  • the right limiting ring 9 has a second notch 91 opposite to the third locking hole 211, and the inner wall of the right limiting ring 9 has a plurality of The convex portion 92, correspondingly, the middle peripheral wall of the right throttle 21 has a plurality of holes 213 for the convex portion 92 to be engaged.
  • a left sleeve 10 is sleeved at the lower end opening of the left section rod 11, and the upper outer surface 101 of the left sleeve 10 is in contact with the inner end surface of the left section rod 11 of the next section.
  • the lower outer surface 102 of the left sleeve 10 is tapered; the upper inner surface of the left sleeve 10 has a plurality of bumps 103.
  • the lower peripheral wall of the left section 11 has a plurality of supply points. The positioning hole 114 into which the bump 103 is stuck is described.
  • a right sleeve 12 is sleeved at a lower end opening of the right joint rod 21, and an upper outer surface 121 of the right sleeve 12 is in contact with an inner end surface of the right joint rod 21 of the lower section, and a lower portion of the right sleeve 12 is
  • the outer surface 122 has a tapered shape.
  • the upper inner surface of the right sleeve 12 has a plurality of bumps 123.
  • the lower peripheral wall of the right joint 21 has a plurality of hooks 123 for the bumps 123.
  • Positioning hole 214 The working principle and process of the embodiment of the present invention are as follows:
  • only one working unit of the left strut 11, the right strut 21, the crosspiece 3 connected to the left and right strut 11, 21, and the upper left and right strut 11, 21 are formed.
  • the left strut 11, the right strut 21, the crosspiece 3 connected to the left and right strut 11, 21, and the upper left and right strut 11, 21 are formed.
  • the locking process of the right throttle lever 21 Pulling up the right throttle lever 21, when the right throttle lever 21 is pulled up into position, the right limit ring 9 is engaged with the gear of the inner shoulder 512 on the right connecting sleeve 51 to block the right throttle lever 21 Further pulled out, and the right limit ring 9 hits the inner shoulder 512 blocked, indicating the user, at this time the right stick 21 has been in place, and the right link 21 is stopped.
  • the fourth locking hole 212 in the middle of the pulled right link 21 is located on the same axis as the upper third locking hole 211 of the next right link 21, and therefore is located between the next section right bar 21
  • the right latch 52 in the gear 3 is ejected by the second spring 53 and sequentially passes through the through hole 513 and the third locking hole 211 of the right connecting sleeve 51, and then inserted into the fourth locking hole 212, and the crosspiece 3 and the upper
  • the right section lever 21 of one section is locked together, and the rail 3 is fixed to the other right section pole 21, so the rail 3, the right section bar 32 connected to the crosspiece 3, and the upper section right section bar 32 are mutually locking.
  • the locking process of the left section lever 11 is the same as that of the right section lever 21 and is performed simultaneously.
  • Unlocking process Open the thumb and forefinger on the same hand, the thumb is in contact with the right control button 7, the index finger is in contact with the left control button 6, and then the left and right control buttons 6 and 7 are moved inwardly at the same time, left and right.
  • the latches 42 and 52 are simultaneously moved toward each other, and the left and right latches 42 and 52 are simultaneously disengaged from the second and fourth locking holes 112 and 212 on the left and right section levers 11, 21 of the previous section, and the crosspiece 3 and the previous section are released. , the lock between the right joint levers 11, 21, the other hand can hold the joint lever.
  • the lower ends of the left and right section bars 11, 21 of the previous section are in frictional contact with the inner faces 101, 121 of the left and right sleeves 10, 12 and the inner end faces of the left and right section bars 11, 21 of the next section, left and right sleeves.
  • the tubes 10 and 12 act as damping to prevent the left and right section rods 11, 21 of the upper section from moving too fast relative to the left and right section rods 11, 21 of the lower section, so as to avoid the strong collision between the adjacent rails 3
  • the crosspiece 3 is damaged, and the noise generated by the crosspiece 3 due to mutual collision can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

An extending ladder comprises a left column(1),a right column(2) and plurality of rungs (3) that extending between the left and the right column, both of the left and the right column include several left and right column units (11,12) which sliding sleeves in turn. A left latch mechanism (4) and a right latch mechanism (5) that has a left and a right control button (6,7) respectively are disposed inside the rung(3), the left and the right control button (6,7) are disposed closely on the middle of the rung (3),so that the two control buttons can be actuated single-handedly to make the rungs(3) unlatched to the corresponding column unit.

Description

一种伸缩梯 技术领域  Extension ladder
本发明涉及一种梯子， 特别是涉及一种包括有若干可相对滑动并且相互嵌套在一 起的梯杆的伸缩梯。 背景技术  BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a ladder, and more particularly to an extension ladder including a plurality of ladder bars that are relatively slidable and nested together. Background technique
在住宅、 公寓、 农场、 工厂和其他地方发生维修或维护任务时， 经常需要使用梯 子。 梯子在不使用的时候必须在某确个地方被收藏起来。 较长的梯子能够让人们到达更 高的高度， 但是却不便于搬运并且在收藏的时候'会占用更多的空间。 而可伸缩的梯子 认  Ladders are often used when repairs or maintenance tasks occur in homes, apartments, farms, factories, and other locations. Ladders must be collected in a certain place when not in use. Longer ladders allow people to reach higher heights, but they are not easy to carry and will take up more space when they are stored. Retractable ladder
就能够在使用时将梯子伸长， 而在收藏时将梯子折叠起来。 It is possible to stretch the ladder during use and fold the ladder when collecting.
在欧洲专利 EP0527766B1中公开了一种类本似结构的伸缩梯， 它包括：  A type of telescopic ladder of the same type is disclosed in the European patent EP 0 527 766 B1, which comprises:
两根由多节可伸缩折叠的节杆组成的梯杆， 每节节杆的底端装配在下一节节杆内 部；  Two ladder rods consisting of multi-section telescopically folded joint rods, the bottom end of each joint rod being assembled inside the lower section rod;
多个横档， 每个横档安装在相对的两侧节杆之间；  a plurality of crosspieces, each crosspiece being mounted between the opposite side rails;
安装在横档内的锁定机构， 用于当节杆被展开时将梯杆的节杆一个接一个地进行 自动锁定；  a locking mechanism installed in the crosspiece for automatically locking the levers of the ladder rod one by one when the joint lever is deployed;
' 其特征在于， 在每根横档因梯子折叠而塌缩并触抵到下级横档时， 该根横档内的 锁定机构即释放上级横档与两侧节杆之间的连接。  The feature is that the locking mechanism in the cross rail releases the connection between the upper rail and the side rails when each rail is collapsed by the folding of the ladder and touches the lower rail.
该专利提供了梯子自下而上地折叠的功能， 一旦最底部的二根横档先折叠， 则从 下往上数第三根横档也自动折叠， 以此类推直至最顶部的横档自动折叠。 但这同时也 成为使用不安全、 易发生事故的隐患， 尤其发生由挤压导致的伤害， 特别是当该梯子 在使用过程中， 如有第三者不小心触动最下级横档的开关， 就会导致全部横档自动折 叠， 极有可能造成站在横档上的使用者跌落、 受伤。  This patent provides the function of folding the ladder from bottom to top. Once the bottom two crosspieces are first folded, the third crosspiece is automatically folded from bottom to top, and so on until the topmost crosspiece is automatically fold. However, this also becomes a hidden danger of using unsafe and prone to accidents, especially the damage caused by squeezing, especially when the ladder is in use, if a third party accidentally touches the switch of the lowermost crosspiece, This will cause all the crosspieces to be automatically folded, which may cause the user standing on the crossbar to fall and be injured.
因此， 现有那种比须一次一个地按下每个横档上的按钮才能将梯子折叠起来的伸 缩梯在使用过程中反而更加安全。  Therefore, the existing extension ladders which are capable of folding the ladders by pressing the buttons on each of the rails one at a time are safer in use.
美国专利 US7048094B2也公开了一种使用方便安全的伸缩梯， 该梯子包括： 第一梯杆， 第二梯杆以及延伸在第一梯杆和第二梯杆之间的若干横档； 第一梯杆包括有第一节杆和第二节杆， 该第一节杆包括有一内表面， 第二节杆通 过嵌套的方式和第一节杆连接成一可沿长度方向相对运动的伸缩结构；  U.S. Patent No. 7,404,094 B2 also discloses a telescopic ladder which is convenient and safe to use. The ladder comprises: a first ladder bar, a second ladder bar and a plurality of crosspieces extending between the first ladder bar and the second ladder bar; The rod includes a first joint rod and a second joint rod, the first joint rod includes an inner surface, and the second joint rod is connected to the first joint rod by a nesting manner to form a telescopic structure that can move relative to each other in the longitudinal direction;
一锁定机构， 可选择地将第二节杆相对第一节杆锁紧；  a locking mechanism for selectively locking the second link rod relative to the first joint rod;
一按钮， 可操作地连接在锁定机构上， 用于操控该锁定机构； 该按钮设置在靠近 第一节杆的位置， 并具有一个可与拇指指尖大小相适配的凹部， 拇指指尖放在该凹部 内可沿着从第一节杆往第二节杆的方向推动按钮而取消锁定机构对第二节杆的锁紧； 一套管， 套设在第二节杆的外表面上； 该套管具有和第一节杆的内表面相接触的 外导向面。 a button operatively coupled to the locking mechanism for manipulating the locking mechanism; the button being disposed adjacent to the first node bar and having a recess adapted to the size of the thumb tip, the thumb tip being placed In the recess, the button can be pushed in the direction from the first link to the second link to cancel the locking of the second link by the locking mechanism; a sleeve is sleeved on the outer surface of the second section rod; the sleeve has an outer guiding surface in contact with the inner surface of the first section rod.
与现有使用较安全的伸缩梯相比， 该权利要求最突出的技术特征是其中的 "按 钮"和 "套管"， 主要解决如何使按钮操控更为方便和如何减小相邻节杆之间的摩擦 和磨损问题。  Compared with the existing safe extension ladders, the most prominent technical features of the claims are the "buttons" and "casings", which mainly solve the problem of how to make the button manipulation more convenient and how to reduce the adjacent node rods. Friction and wear problems.
人们按常识理解， 认为一般将按钮随着在靠近节杆位置更加便于使用者操作锁定 结构， 以将特征收缩， 由于每个横档上的按钮各有两个， 且分别设于横档的两端位置 处， 因此操作时必须使用双手握持第一梯杆、 第二梯杆同时伸出拇指触动按钮来操作 锁定结构， 也就是说必须使用双手才能完成同时对两个按钮的操作过程， 实际使用表 明， 这种操控方式仍嫌不够方便。  People understand by common sense that it is generally easier for the user to operate the locking structure with the button closer to the node to shrink the feature, since each button on each crossbar has two, and each is set to two in the crosspiece. At the end position, it is necessary to use both hands to hold the first ladder rod and the second ladder rod while extending the thumb touch button to operate the locking structure, that is, the hands must be used to complete the operation of the two buttons at the same time, actually The use shows that this type of control is still not convenient enough.
综上所述， 现有伸缩梯还可作进一步改进。 发明内容  In summary, the existing extension ladder can be further improved. Summary of the invention
本发明所要解决的技术问题是针对上述现有技术现状而提供一种便于单手操作操 控按钮而使横档与相应节杆解锁的伸缩梯， 从而使梯子的折叠操作更加方便。  The technical problem to be solved by the present invention is to provide an extension ladder which is convenient for one-hand operation of the operation button to unlock the crosspiece and the corresponding joint lever, thereby making the folding operation of the ladder more convenient.
本发明所要解决的第二个技术问题是： 提供一种可在快速拉动节杆时防止上一节 节杆脱离下一节节杆、 并可提示使用者节杆拉动到位与否的伸缩梯。  The second technical problem to be solved by the present invention is to provide an extension ladder that can prevent the upper section lever from being disengaged from the next section lever when the lever is quickly pulled, and can prompt the user to pull the lever in place.
本发明解决上述技术问题所采用的技术方案为： 一种伸缩梯， 包括有二根相对设 置的左梯杆和右梯杆， 及多个设置在该左、 右梯杆之间的横档， 其中左梯杆由多节可 伸缩折叠的左节杆依次套接组成， 右梯杆由多节可伸缩折叠的右节杆依次套接组成， 而横档则安装在相对的二根左、 右节杆之间， 并且在横档内设置有在梯子展开时将横 档与上一节的左节杆锁定的左锁定机构， 及将横档与上一节的右节杆锁定的右锁定机 构， 以防止梯子收缩折叠， 该左、 右锁定机构分别具有左、 右操控按钮； 其特征在 于： 所述的左、 右操控按钮位于横***部位且彼此邻近设置， 便于一只手同时操作 这二个操控按钮而使该横档与相应节杆解锁。  The technical solution adopted by the present invention to solve the above technical problem is: an extension ladder comprising two oppositely disposed left and right ladder bars, and a plurality of crosspieces disposed between the left and right ladder bars, The left ladder rod is composed of a plurality of sections of the telescopically folded left section poles, and the right ladder pole is composed of a plurality of sections of the retractable right section rods, and the crosspieces are installed on the opposite two left and right sides. Between the levers, and in the crosspiece are provided a left locking mechanism that locks the crosspiece with the left section of the previous section when the ladder is deployed, and a right locking mechanism that locks the crosspiece with the right section of the previous section In order to prevent the ladder from shrinking and folding, the left and right locking mechanisms respectively have left and right manipulation buttons; wherein: the left and right manipulation buttons are located at the central portion of the crosspiece and are arranged adjacent to each other, so that one hand can operate simultaneously. Two control buttons unlock the crosspiece and the corresponding club.
上述的左锁定机构还包括：  The above left locking mechanism further includes:
连接在横档左端的左连接套， 该左连接套将横档与相应左节杆的上部相互连接； 设于横档内的左插销， 该左插销可相对横档水平横向移动并能伸出横档左侧外 部；  a left connecting sleeve connected to the left end of the crosspiece, the left connecting sleeve interconnecting the crosspiece with the upper portion of the corresponding left strut; the left latch disposed in the crosspiece, the left latch is horizontally movable relative to the crosspiece and can extend horizontally Outside the left side of the file;
套设在所述的左插销上、 并使左插销始终保持外露出横档左侧外部趋势的第一弹 簧；  a first spring that is sleeved on the left pin and keeps the left pin always exposed to the left outer side of the crosspiece;
所述的左操控按钮与所述的左插销相连， 对应地， 所述的左节杆上部开有供左插 销穿过的第一锁定孔， 左节杆的中部也开有供左插销***的第二锁定孔；  The left control button is connected to the left pin. Correspondingly, the upper portion of the left node has a first locking hole for the left pin to pass through, and the middle portion of the left bar is also provided with a left pin for insertion. Second locking hole;
所述的右锁定机构还包括： 连接在横档右端的右连接套， 该右连接套将横档与相 应右节杆的上部相互连接； The right locking mechanism further includes: a right connecting sleeve connected to the right end of the crosspiece, the right connecting sleeve connecting the crosspiece and the phase The upper portions of the right section rods should be connected to each other;
设于横档内的右插销， 该右插销可相对横档水平横向移动并能伸出横档右侧外 部；  a right latch disposed in the crosspiece, the right latch is horizontally movable relative to the horizontal axis and can extend outside the right side of the crosspiece;
套设在所述的右插销上、 并使右插销始终保持外露出横档右侧外部趋势的第二弹 簧；  a second spring that is sleeved on the right pin and that keeps the right pin always exposed to the outer right side of the crosspiece;
所述的右操控按钮与所述的右插销相连， 对应地， 所述的右节杆上部开有供右插 销穿过的第三锁定孔， 右节杆的中部也开有供右插销***的第四锁定孔。  The right control button is connected to the right pin. Correspondingly, the upper portion of the right node is provided with a third locking hole for the right pin to pass through, and the middle portion of the right node is also provided with a right pin for insertion. The fourth locking hole.
前述锁定机构涉及的部件少， 故其是一种结构较为简单的锁定机构， 当然该锁定 机构还可采用现有伸缩梯中的各种锁定方式。  The aforementioned locking mechanism involves few components, so it is a relatively simple locking mechanism. Of course, the locking mechanism can also adopt various locking modes in the existing extension ladder.
上述的横档内左侧具有第一弹簧座， 所述的左插销可活动地穿过该第一弹簧座， 所述的第一弹簧设于该第一弹簧座内， 该第一弹簧一端抵靠在第一弹簧座的右侧内 壁， 另一端抵靠在左插销中部的凸肩上； 所述的横档内右侧具有第二弹簧座， 所述的 右插销可活动地穿过该第二弹簧座， 所述的第二弹簧设于该第二弹簧座内， 该第二弹 簧一端抵靠在第二弹簧座的左侧内壁， 另一端抵靠在右插销中部的凸肩上。  The left side of the crosspiece has a first spring seat, the left pin is movablely passed through the first spring seat, and the first spring is disposed in the first spring seat, and the first spring is abutted Relying on the right inner wall of the first spring seat, the other end abutting against the shoulder of the middle of the left pin; the right side of the crosspiece has a second spring seat, and the right pin is movable through the first The second spring is disposed in the second spring seat, the second spring abuts against the left inner wall of the second spring seat, and the other end abuts against the shoulder of the middle of the right pin.
所述的弹簧座不但起到容置弹簧的作用， 而且还具有支撑插销的作用。  The spring seat not only functions to accommodate the spring, but also has the function of supporting the bolt.
上述的横档内左侧具有左限位块， 所述的左插销可活动地穿过该左限位块， 且左 插销上间隔固定有二个与左限位块端面挡配的挡环， 所述的二个挡环位于左限位块两 侧； 所述的横档内右侧具有右限位块， 所述的右插销可活动地穿过地该右限位块， 且 右插销上间隔固定有二个与右限位块端面挡配的挡环， 所述的二个挡环位于右限位块 两侧。 通过限位块对插销的限位， 能很好地控制左、 右操控按钮在一个适合的范围内 移动。 当然对插销移动进行限位的结构并不局限于这一种， 也可以采用其他现有技 术。 为解决本发明的第二个技术问题， 所述左节杆外周面的中部套设有左限位环， 该 左限位环位于相邻两节左节杆之间， 对应地， 所述的左连接套具有环形表面， 该环形 表面形成套接口， 该套接口与左节杆上部外周紧配， 所述的套接口内壁上端形成能与 左限位环挡配的内肩胛， 左连接套上还具有供左插销穿过且与所述的套接口相贯通的 通孔； 所述右节杆外周面的中部套设有右限位环， 该右限位环位于相邻两节右节杆之 间， 对应地， 所述的右连接套具有环形表面， 该环形表面形成套接口， 该套接口与右 节杆上部外周紧配， 所述的套接口内壁上端形成能与右限位环挡配的内肩胛， 右连接 套上还具有供右插销穿过且与所述的套接口相贯通的通孔。  The left side of the above-mentioned crosspiece has a left limit block, the left pin is movablely passed through the left limit block, and the left pin is fixed with two retaining rings arranged on the end face of the left limit block. The two retaining rings are located on two sides of the left limiting block; the right side of the crossbar has a right limiting block, and the right latch is movable through the right limiting block, and the right locking pin Two spacer rings are arranged at the interval, and the two retaining rings are located on both sides of the right limiting block. Through the limit of the limit block to the pin, the left and right control buttons can be well controlled to move within a suitable range. Of course, the structure for limiting the movement of the pin is not limited to this one, and other prior art techniques may be employed. In order to solve the second technical problem of the present invention, the middle portion of the outer peripheral surface of the left joint rod is provided with a left limit ring, and the left limit ring is located between two adjacent left joint rods, correspondingly, The left connecting sleeve has an annular surface, and the annular surface forms a socket. The socket is tightly fitted with the outer circumference of the upper portion of the left joint. The upper end of the inner wall of the sleeve forms an inner shoulder that can be blocked from the left limiting ring. The utility model further has a through hole for the left pin to pass through and penetrates with the socket; the middle portion of the outer peripheral surface of the right bar is sleeved with a right limiting ring, and the right limiting ring is located at two adjacent right links Correspondingly, the right connecting sleeve has an annular surface, and the annular surface forms a socket. The socket is tightly fitted with the outer periphery of the upper right rod. The upper end of the inner wall of the sleeve is formed with a right limiting ring. The inner shoulder sleeve is provided with a through hole for the right pin to pass through and penetrate the socket.
当节杆向上拉动到位后， 通过限位环与连接套上内肩胛的挡位配合， 阻止节杆进 一步被拉出， 且限位环碰到内肩胛受阻， 即不能再轻松拉动节杆状态下， 便提示使用 者： 此时节杆已经到位， 可以停止拉动节杆。 限位环限位在节杆上的方式可采用如下节杆： 所述的左限位环上具有一与所述的 第一锁定孔相对的第一缺口， 且所述左限位环的内壁具有数个凸部， 对应地， 所述的 左节杆中部周壁具有数个供所述的凸部卡入的孔； 所述的右限位环上具有一与所述的 第三锁定孔相对的第二缺口， 且所述右限位环的内壁具有数个凸部， 对应地， 所述的 右节杆中部周壁具有数个供所述的凸部卡入的孔。 该节杆可使限位环方便而牢靠限位 在节杆中部， 操作使沿缺口方向掰开限位环， 将限位环扣于节杆外周面， 并使凸部卡 入对应的孔内， 即可将限位环安装完毕。 上述的左节杆下端开口处套设有一左管套， 该左管套的上部外表面与下一节的左 节杆内端面接触， 所述的左管套的下部外表面呈锥形； 所述的右节杆下端开口处套设 有一右管套， 该右管套的上部外表面与下一节的右节杆内端面接触， 所述的右管套的 下部外表面呈锥形。 上述结构中， 左、 右管套的上部外表面分别与下一节的左、 右节 杆内端面接触， 起到在相邻节杆间相对移动时的阻尼作用， 防止节杆相对移动过快， 避免相邻的横档之间相互大力碰撞而损坏横档， 且可减少横档因相互碰撞而产生的噪 声； 而左、 右管套的下部外表面呈锥形则便于我们将上一节节杆***到下一节节杆 内。 When the strut is pulled up in position, the limit ring is matched with the gear of the inner shoulder of the connecting sleeve to prevent the strut from being further pulled out, and the limit ring is blocked when the inner shoulder is blocked, that is, the strut can no longer be easily pulled. , the user is prompted: At this time, the node bar is already in place, and the lever can be stopped. The manner in which the limiting ring is limited to the node bar may be as follows: the left limiting ring has a first notch opposite to the first locking hole, and the inner wall of the left limiting ring Having a plurality of convex portions, correspondingly, the middle peripheral wall of the left joint rod has a plurality of holes for the convex portions to be engaged; the right limit ring has a third locking hole And a second notch, and the inner wall of the right limiting ring has a plurality of convex portions. Correspondingly, the middle peripheral wall of the right right bar has a plurality of holes for the convex portion to be engaged. The joint rod can make the limit ring convenient and securely restrained in the middle of the joint rod, and the operation causes the limit ring to be opened in the direction of the notch, the limit ring is fastened to the outer peripheral surface of the joint rod, and the convex portion is inserted into the corresponding hole. , you can install the limit ring. a left sleeve is sleeved at the lower end opening of the left joint rod, and an upper outer surface of the left sleeve is in contact with an inner end surface of the left section of the lower section, and a lower outer surface of the left sleeve is tapered; A right sleeve is sleeved at the lower end opening of the right joint rod, and an upper outer surface of the right sleeve is in contact with an inner end surface of the right section of the lower section, and a lower outer surface of the right sleeve is tapered. In the above structure, the upper outer surfaces of the left and right sleeves are respectively in contact with the inner end faces of the left and right joints of the next section, thereby playing a damping role when the relative movements between the adjacent joints are relatively prevented, thereby preventing the relative movement of the joints from being too fast. Avoiding the collision between adjacent crosspieces and damaging the crosspiece, and reducing the noise caused by the collision of the crosspieces; the lower outer surface of the left and right sleeves is tapered to facilitate the previous section. The pole is inserted into the next section of the pole.
上述的左管套的上部内表面具有数个凸点， 对应地， 所述的左节杆下部周壁具有 数个供所述的凸点卡入的定位孔； 所述的右管套的上部内表面具有数个凸点， 对应 地， 所述的右节杆下部周壁具有数个供所述的凸点卡入的定位孔。 通过凸点和定位孔 的配合便可将管套安装到节杆下端， 该到位节杆简单、 装配方便。  The upper inner surface of the left sleeve has a plurality of bumps. Correspondingly, the lower peripheral wall of the left joint has a plurality of positioning holes for the bumps to be engaged; the upper portion of the right sleeve The surface has a plurality of bumps. Correspondingly, the lower peripheral wall of the right mast has a plurality of positioning holes for the bumps to be engaged. The sleeve can be mounted to the lower end of the joint by the cooperation of the bump and the positioning hole, and the joint rod is simple and convenient to assemble.
为便于我们用手指操作操控按钮， 上述的左操控按钮的右侧具有便于指尖搭设的 挡部； 所述的右操控按钮的左侧具有便于指尖搭设的挡部。 将挡部设于操控按钮的内 侧， 可减少手指间的操作跨度， 手指能更好对操控按钮使力， 操作更轻松。 与现有技术相比， 本发明的优点在于： 该伸缩梯将左、 右操控按钮设于横*** 部位且彼此邻近设置， 故操作时只需张开同只手上的大拇指和食指， 大拇指与右操控 按钮接触， 食指与左操控按钮接触， 然后同时朝内用力驱动左、 右操控按钮相向移 动， 以操作左、 右锁定机构解除横档与相应左、 右节杆之间锁止， 操作相当方便， 腾 出的另一只手可握持住节杆， 让节杆缓慢下移， 避免相邻横档间的撞击， 使操作过程 平稳进行。 附图说明  In order to facilitate the operation of the control button with a finger, the left side of the left control button has a stopper for facilitating fingertip erection; the left side of the right manipulation button has a stopper for facilitating fingertip erection. The stopper is arranged on the inner side of the control button, which can reduce the operation span between the fingers, and the finger can better control the button and make the operation easier. Compared with the prior art, the invention has the advantages that: the extension ladder sets the left and right control buttons in the central part of the crosspiece and is adjacent to each other, so that only the thumbs and forefingers of the same hand are opened during operation, and the thumb is In contact with the right control button, the index finger is in contact with the left control button, and then the left and right control buttons are driven inwardly to move toward each other to operate the left and right locking mechanisms to unlock the crosspiece and the corresponding left and right joint levers. It is quite convenient. The other hand that can be vacated can hold the node bar, let the node slowly move down, avoid the impact between adjacent crosspieces, and make the operation smooth. DRAWINGS
图 1为本发明实施例的立体结构示意图；  1 is a schematic perspective view of an embodiment of the present invention;
图 2为本发明实施例的剖视图； 图 3为图 2的 A处放大图； Figure 2 is a cross-sectional view showing an embodiment of the present invention; Figure 3 is an enlarged view of A of Figure 2;
图 4为图 2的 B处放大图；  Figure 4 is an enlarged view of B of Figure 2;
图 5为图 2的 C处放大图；  Figure 5 is an enlarged view of the portion C of Figure 2;
图 6为图 2的 D处放大图；  Figure 6 is an enlarged view of D of Figure 2;
图 7为图 2的 E处放大图；  Figure 7 is an enlarged view of E at Figure 2;
图 8为图 2的 F处放大图；  Figure 8 is an enlarged view of the F of Figure 2;
图 9为本发明实施例的立体分解图；  Figure 9 is an exploded perspective view of an embodiment of the present invention;
图 10为本发明实施例中限位环及管套与节杆之间安装示意图。 具体实施方式  FIG. 10 is a schematic view showing the installation between the limiting ring and the sleeve and the joint rod in the embodiment of the present invention. detailed description
以下结合附图实施例对本发明作进一步详细描述。  The invention will be further described in detail below with reference to the embodiments of the drawings.
如图 1〜 10所示为本发明的一个优选实施例。  A preferred embodiment of the present invention is shown in Figures 1-10.
一种伸缩梯， 包括有二根相对设置的左梯杆 1和右梯杆 2， 及多个设置在该左、 右 梯杆 1、 2之间的横档 3， 其中左梯杆 1由多节可伸缩折叠的左节杆 1 1依次套接组成而形 成一个伸缩结构， 右梯杆 2由多节可伸缩折叠的右节杆 21依次套接组成而形成一个伸缩 结构， 所述的左、 右节杆 11、 21呈大致的管状。  An extension ladder comprising two oppositely disposed left ladder bars 1 and right ladder bars 2, and a plurality of crosspieces 3 disposed between the left and right ladder bars 1, 2, wherein the left ladder bars 1 are The telescopically folded left section bar 1 1 is sleeved in sequence to form a telescopic structure, and the right ladder bar 2 is sequentially assembled by a plurality of sections of the telescopically folded right section bar 21 to form a telescopic structure, the left side, The right section bars 11, 21 are generally tubular.
所述的横档 3则安装在相对的二根左、 右节杆 11、 21之间， 横档 3呈中空的长方体 状， 所述的横档 3内设置有在梯子展开时将横档 3与上一节的左节杆 11锁定的左锁定机 构 4， 及将横档 3与上一节的右节杆 21锁定的右锁定机构 5， 以防止梯子收缩折叠， 该 左、 右锁定机构 4、 5分别具有用于操作该两个锁定结构的左、 右操控按钮 6、 7。  The crosspiece 3 is installed between the two opposite left and right joint rods 11, 21, and the crosspiece 3 has a hollow rectangular parallelepiped shape, and the crosspiece 3 is provided with a crosspiece 3 when the ladder is deployed. a left locking mechanism 4 locked with the left section lever 11 of the previous section, and a right locking mechanism 5 for locking the rail 3 to the right section lever 21 of the upper section to prevent the ladder from being retracted and folded, the left and right locking mechanisms 4 And 5 respectively have left and right manipulation buttons 6, 7 for operating the two locking structures.
如图 3、 7所示， 所述的左锁定机构 4还包括：  As shown in FIG. 3 and 7, the left locking mechanism 4 further includes:
连接在横档 3左端的左连接套 41， 该左连接套 41将横档 3与相应左节杆 11的上部相 互连接；  a left connecting sleeve 41 connected to the left end of the crosspiece 3, the left connecting sleeve 41 interconnecting the crosspiece 3 with the upper portion of the corresponding left joint rod 11;
设于横档 3内的左插销 42， 该左插销 42可相对横档 3水平横向移动并能伸出横档 3左 侧外部；  a left latch 42 disposed in the crosspiece 3, the left latch 42 is horizontally movable relative to the crosspiece 3 and can extend outside the left side of the crosspiece 3;
套设在所述的左插销 42上、 并使左插销 42始终保持外露出横档 3左侧外部趋势的第 一弹簧 43;  The first spring 43 is sleeved on the left latch 42 and the left latch 42 is always kept exposed to the left outer side of the crosspiece 3;
横档 3内左侧具有第一弹簧座 44， 所述的左插销 42可活动地穿过该第一弹簧座 44， 所述的第一弹簧 43设于该第一弹簧座 44内， 该第一弹簧 43—端抵靠在第一弹簧座 44的 右侧内壁， 另一端抵靠在左插销 42中部的凸肩 421上；  The left side of the crosspiece 3 has a first spring seat 44. The left latch 42 is movably passed through the first spring seat 44. The first spring 43 is disposed in the first spring seat 44. a spring 43-end abuts against the right inner wall of the first spring seat 44, and the other end abuts against the shoulder 421 of the middle of the left pin 42;
在所述的横档 3内左侧具有左限位块 45， 所述的左插销 42可活动地穿过该左限位块 45 , 且左插销 42上间隔固定有二个与左限位块 45端面挡配的挡环 46， 所述的二个挡环 46位于左限位块 45两侧； 所述的左操控按钮 6与该左插销 42相连， 对应地， 所述的左节 杆 11上部开有供左插销 42穿过的第一锁定孔 111， 左节杆 11的中部也开有供左插销 42插 入的第二锁定孔 112。 There is a left limit block 45 on the left side of the crosspiece 3, the left pin 42 is movable through the left limit block 45, and the left pin 42 is fixed with two left and left limit blocks. The retaining ring 46 of the 45 end face is arranged, the two retaining rings 46 are located on both sides of the left limiting block 45; the left control button 6 is connected to the left latch 42, correspondingly, the left node 11 The upper portion has a first locking hole 111 through which the left pin 42 passes, and the middle portion of the left node 11 is also opened for the left pin 42 to be inserted. The second locking hole 112 is inserted.
如图 4、 8所示， 所述的右锁定机构 5还包括：  As shown in FIGS. 4 and 8, the right locking mechanism 5 further includes:
连接在横档 3右端的右连接套 51， 该右连接套 51将横档 3与相应右节杆 21的上部相 互连接：  A right connecting sleeve 51 connected to the right end of the crosspiece 3, the right connecting sleeve 51 interconnecting the crosspiece 3 with the upper portion of the corresponding right joint 21:
设于横档 3内的右插销 52， 该右插销 52可相对横档 3水平横向移动并能伸出横档 3右 侧外部：  a right latch 52 disposed in the crosspiece 3, the right latch 52 being horizontally movable relative to the crosspiece 3 and extending beyond the right side of the crosspiece 3:
套设在所述的右插销 52上、 并使右插销 52始终保持外露出横档 3右侧外部趋势的第 二弹簧 53 ;  The second spring 53 is disposed on the right latch 52 and keeps the right latch 52 always exposed to the outer right side of the crosspiece 3;
横档 3内右侧具有第二弹簧座 54， 所述的右插销 52可活动地穿过该第二弹簧座 54， 所述的第二弹簧 53设于该第二弹簧座 54内， 该第二弹簧 53—端抵靠在第二弹簧座 54的 左侧内壁， 另一端抵靠在右插销 52中部的凸肩 521上；  a second spring seat 54 is disposed on the right side of the crosspiece 3, and the right latch 52 is movably passed through the second spring seat 54. The second spring 53 is disposed in the second spring seat 54. The two springs 53 are abutted against the left inner wall of the second spring seat 54 and the other end abuts against the shoulder 521 of the middle of the right pin 52;
在所述的横档 3内右侧具有右限位块 55， 所述的右插销 52可活动地穿过该右限位块 55， 且右插销 52上间隔固定有二个与右限位块 55端面挡配的挡环 56， 所述的二个挡环 56位于右限位块 55两侧； 所述的右操控按钮 7与该右插销 52相连， 对应地， 所述的右节 杆 21上部开有供右插销 52穿过的第三锁定孔 211， 右节杆 21的中部也开有供右插销 52插 入的第四锁定孔 212。  There is a right limiting block 55 on the right side of the crosspiece 3, the right latch 52 is movably passed through the right limiting block 55, and two right and right limiting blocks are fixed on the right latch 52. The retaining ring 56 of the end face of the 55, the two retaining rings 56 are located on both sides of the right limiting block 55; the right operating button 7 is connected to the right latch 52, correspondingly, the right node 21 The upper portion is provided with a third locking hole 211 through which the right pin 52 passes, and the middle portion of the right lever 21 is also provided with a fourth locking hole 212 through which the right pin 52 is inserted.
所述的左、 右操控按钮 6、 7位于横档 3中央部位且彼此邻近设置， 即在横档 3中部 开有二个供左、 右操控按钮 6、 7穿出的左、 右槽 31、 32， 左、 右操控按钮 6、 7分别限 位在左、 右槽 31、 32内， 并可分别相对左、 右槽 31、 32横向移动， 这样便于一只手同 时操作这二个操控按钮 6、 7而使横档 3与相应节杆 11、 21解锁。 所述的左操控按钮 6的 右侧具有便于指尖搭设的挡部 61 ; 所述的右操控按钮 7的左侧具有便于指尖搭设的挡部 71。 在左节杆 11外周面的中部套设有左限位环 8， 该左限位环 8位于相邻两节左节杆 11 之间， 对应地， 所述的左连接套 41具有环形表面， 该环形表面形成套接口 411， 该套接 口 411与左节杆 11上部外周紧配， 并通过连接件连接， 所述的套接口 411内壁上端形成 能与左限位环 8挡配的内肩胛 412， 左连接套 41上还具有供左插销 42穿过且与所述的套 接口 411相贯通的通孔 413; 所述的左限位环 8上具有一与所述的第一锁定孔 111相对的 第一缺口 81， 且所述左限位环 8的内壁具有数个凸部 82， 对应地， 所述的左节杆 11中部 周壁具有数个供所述的凸部 82卡入的孔 113。  The left and right control buttons 6, 7 are located at the central portion of the crosspiece 3 and are disposed adjacent to each other, that is, in the middle of the crosspiece 3, there are two left and right slots 31 for the left and right manipulation buttons 6, 7 to pass through, 32, the left and right control buttons 6, 7 are respectively limited in the left and right slots 31, 32, and can be laterally moved relative to the left and right slots 31, 32, respectively, so that one hand can simultaneously operate the two control buttons 6 7, and the crosspiece 3 is unlocked with the corresponding joint levers 11, 21. The right side of the left manipulation button 6 has a stopper 61 for facilitating fingertip erection; the left side of the right manipulation button 7 has a stopper 71 for facilitating fingertip erection. A left limiting ring 8 is disposed in a middle portion of the outer peripheral surface of the left knuckle 11 , and the left limiting ring 8 is located between the adjacent two left knuckles 11 . Correspondingly, the left connecting sleeve 41 has an annular surface. The annular surface forms a socket 411. The socket 411 is tightly coupled to the outer periphery of the upper portion of the left joint rod 11 and is connected by a connecting member. The upper end of the inner wall of the sleeve 411 forms an inner shoulder 412 that can be blocked from the left limiting ring 8. The left connecting sleeve 41 further has a through hole 413 through which the left latch 42 passes and penetrates the socket 411. The left limiting ring 8 has a first locking hole 111 opposite thereto. a first notch 81, and the inner wall of the left limiting ring 8 has a plurality of convex portions 82. Correspondingly, the central peripheral wall of the left fixed bar 11 has a plurality of holes 113 for the convex portion 82 to be engaged. .
所述右节杆 21外周面的中部套设有右限位环 9， 该右限位环 9位于相邻两节右节杆 21之间， 对应地， 所述的右连接套 51具有环形表面， 该环形表面形成套接口 511， 该套 接口 511与右节杆 21上部外周紧配， 并通过连接件连接， 所述的套接口 511内壁上端形 成能与右限位环 9挡配的内肩胛 512， 右连接套 51上还具有供右插销 52穿过且与所述的 套接口 511相贯通的通孔 513 ; 所述的右限位环 9上具有一与所述的第三锁定孔 211相对 的第二缺口 91， 且所述右限位环 9的内壁具有数个凸部 92， 对应地， 所述的右节杆 21中 部周壁具有数个供所述的凸部 92卡入的孔 213。 如图 9、 10所示， 所述的左节杆 11下端开口处套设有一左管套 10， 该左管套 10的上 部外表面 101与下一节的左节杆 11内端面接触， 所述的左管套 10的下部外表面 102呈锥 形； 所述的左管套 10的上部内表面具有数个凸点 103， 对应地， 所述的左节杆 11下部周 壁具有数个供所述的凸点 103卡入的定位孔 114。 a right limiting ring 9 is disposed in a middle portion of the outer peripheral surface of the right knuckle 21, and the right limiting ring 9 is located between two adjacent right knuckles 21, and correspondingly, the right connecting sleeve 51 has an annular surface. The annular surface forms a socket 511. The socket 511 is tightly coupled with the outer periphery of the upper right rod 21, and is connected by a connecting member. The upper end of the inner wall of the socket 511 forms an inner shoulder that can be blocked from the right limiting ring 9. 512, the right connecting sleeve 51 further has a right plug 52 for passing through and a through hole 513 through which the socket 511 passes; the right limiting ring 9 has a second notch 91 opposite to the third locking hole 211, and the inner wall of the right limiting ring 9 has a plurality of The convex portion 92, correspondingly, the middle peripheral wall of the right throttle 21 has a plurality of holes 213 for the convex portion 92 to be engaged. As shown in FIG. 9 and FIG. 10, a left sleeve 10 is sleeved at the lower end opening of the left section rod 11, and the upper outer surface 101 of the left sleeve 10 is in contact with the inner end surface of the left section rod 11 of the next section. The lower outer surface 102 of the left sleeve 10 is tapered; the upper inner surface of the left sleeve 10 has a plurality of bumps 103. Correspondingly, the lower peripheral wall of the left section 11 has a plurality of supply points. The positioning hole 114 into which the bump 103 is stuck is described.
所述的右节杆 21下端开口处套设有一右管套 12， 该右管套 12的上部外表面 121与下 一节的右节杆 21内端面接触， 所述的右管套 12的下部外表面 122呈锥形； 所述的右管套 12的上部内表面具有数个凸点 123， 对应地， 所述的右节杆 21下部周壁具有数个供所述 的凸点 123卡入的定位孔 214。 本发明实施例的工作原理及过程如下：  a right sleeve 12 is sleeved at a lower end opening of the right joint rod 21, and an upper outer surface 121 of the right sleeve 12 is in contact with an inner end surface of the right joint rod 21 of the lower section, and a lower portion of the right sleeve 12 is The outer surface 122 has a tapered shape. The upper inner surface of the right sleeve 12 has a plurality of bumps 123. Correspondingly, the lower peripheral wall of the right joint 21 has a plurality of hooks 123 for the bumps 123. Positioning hole 214. The working principle and process of the embodiment of the present invention are as follows:
在这仅以其中左节杆 11、 右节杆 21、 与该左、 右节杆 11、 21相连的横档 3、 上一节 左、 右节杆 11、 21构成的一个工作单元的动作过程为例。  In this case, only one working unit of the left strut 11, the right strut 21, the crosspiece 3 connected to the left and right strut 11, 21, and the upper left and right strut 11, 21 are formed. For example.
右节杆 21的锁定过程： 上拉右节杆 21， 当右节杆 21向上拉动到位后， 通过右限位 环 9与右连接套 51上内肩胛 512的挡位配合， 阻止右节杆 21进一步被拉出， 且右限位环 9 碰到内肩胛 512受阻， 便指示使用者， 此时右节杆 21已经到位， 停止拉动右节杆 21。 此 时， 该被拉动的右节杆 21中部的第四锁定孔 212与下一节右节杆 21上部第三锁定孔 211 位于同一轴线上， 因此， 位于下一节右节杆 21之间横档 3内的右插销 52在第二弹簧 53的 作用下弹出， 依次穿过右连接套 51上的通孔 513、 第三锁定孔 211后***第四锁定孔 212 内， 将横档 3与上一节的右节杆 21锁定在一起， 而横档 3又是与另一右节杆 21固定， 因 此横档 3、 与横档 3相连的右节杆 32、 上一节右节杆 32相互锁定。  The locking process of the right throttle lever 21: Pulling up the right throttle lever 21, when the right throttle lever 21 is pulled up into position, the right limit ring 9 is engaged with the gear of the inner shoulder 512 on the right connecting sleeve 51 to block the right throttle lever 21 Further pulled out, and the right limit ring 9 hits the inner shoulder 512 blocked, indicating the user, at this time the right stick 21 has been in place, and the right link 21 is stopped. At this time, the fourth locking hole 212 in the middle of the pulled right link 21 is located on the same axis as the upper third locking hole 211 of the next right link 21, and therefore is located between the next section right bar 21 The right latch 52 in the gear 3 is ejected by the second spring 53 and sequentially passes through the through hole 513 and the third locking hole 211 of the right connecting sleeve 51, and then inserted into the fourth locking hole 212, and the crosspiece 3 and the upper The right section lever 21 of one section is locked together, and the rail 3 is fixed to the other right section pole 21, so the rail 3, the right section bar 32 connected to the crosspiece 3, and the upper section right section bar 32 are mutually locking.
左节杆 11的锁定过程与右节杆 21的锁定过程相同并同时进行。  The locking process of the left section lever 11 is the same as that of the right section lever 21 and is performed simultaneously.
解锁过程： 张开同只手上的大拇指和食指， 大拇指与右操控按钮 7接触， 食指与左 操控按钮 6接触， 然后同时朝内用力驱动左、 右操控按钮 6、 7相向移动， 左、 右插销 42、 52同时相向移动， 左、 右插销 42、 52同时脱离上一节左、 右节杆 11、 21上的第 二、 四锁定孔 112、 212, 解除该横档 3与上一节左、 右节杆 11、 21之间的锁止， 另一只 手可握持住节杆。  Unlocking process: Open the thumb and forefinger on the same hand, the thumb is in contact with the right control button 7, the index finger is in contact with the left control button 6, and then the left and right control buttons 6 and 7 are moved inwardly at the same time, left and right. The latches 42 and 52 are simultaneously moved toward each other, and the left and right latches 42 and 52 are simultaneously disengaged from the second and fourth locking holes 112 and 212 on the left and right section levers 11, 21 of the previous section, and the crosspiece 3 and the previous section are released. , the lock between the right joint levers 11, 21, the other hand can hold the joint lever.
上一节左、 右节杆 11、 21的下端在左、 右套管 10、 12的上部外表面 101、 121与下 一节左、 右节杆 11、 21内端面摩擦接触， 左、 右套管 10、 12起到阻尼作用， 防止上一 节左、 右节杆 11、 21相对下一节左、 右节杆 11、 21移动过快， 避免相邻的横档 3之间相 互大力碰撞而损坏横档 3， 且可减少横档 3因相互碰撞而产生的噪声。  The lower ends of the left and right section bars 11, 21 of the previous section are in frictional contact with the inner faces 101, 121 of the left and right sleeves 10, 12 and the inner end faces of the left and right section bars 11, 21 of the next section, left and right sleeves. The tubes 10 and 12 act as damping to prevent the left and right section rods 11, 21 of the upper section from moving too fast relative to the left and right section rods 11, 21 of the lower section, so as to avoid the strong collision between the adjacent rails 3 The crosspiece 3 is damaged, and the noise generated by the crosspiece 3 due to mutual collision can be reduced.

Claims

权 利 要 求 Rights request
1、 一种伸缩梯， 包括有二根相对设置的左梯杆 (1)和右梯杆 (2)， 及多个设置在该 左、 右梯杆 (1、 2)之间的横档 (3)， 其中左梯杆 (1)由多节可伸缩折叠的左节杆 (11)依次套 接组成， 右梯杆 (2)由多节可伸縮折叠的右节杆 (21)依次套接组成， 而横档 (3)则安装在 相对的二根左、 右节杆 (11、 21)之间， 并且在横档 (3)内设置有在梯子展开时将横档 (3) 与上一节的左节杆 (11)锁定的左锁定机构 (4)， 及将横档 (3)与上一节的右节杆 (21)锁定的 右锁定机构 (5)， 以防止梯子收缩折叠， 该左、 右锁定机构 (4、 5)分别具有左、 右操控 按钮 (6、 7)； 其特征在于： 所述的左、 右操控按钮 (6、 7)位于横档 (3)中央部位且彼此邻 近设置， 便于一只手同时操作这二个操控按钮 (6、 7)而使该横档 (3)与相应节杆 (11、 21) 解锁。 1. An extension ladder comprising two oppositely disposed left ladder bars (1) and right ladder bars (2), and a plurality of crosspieces disposed between the left and right ladder bars (1, 2) ( 3), wherein the left ladder pole (1) is composed of a plurality of sections of the telescopically folded left section poles (11), and the right ladder poles (2) are sequentially sleeved by the plurality of sections of the telescopically folded right section poles (21). Composition, and the crosspiece (3) is installed between the opposite two left and right joint rods (11, 21), and the crosspiece (3) is provided with the crosspiece (3) and the upper portion when the ladder is deployed a left locking mechanism (4) for locking the left section lever (11), and a right locking mechanism (5) for locking the crosspiece (3) with the right section lever (21) of the previous section to prevent the ladder from collapsing and folding The left and right locking mechanisms (4, 5) respectively have left and right control buttons (6, 7); wherein: the left and right control buttons (6, 7) are located at the center of the crosspiece (3) And disposed adjacent to each other, it is convenient for one hand to operate the two control buttons (6, 7) at the same time to unlock the crosspiece (3) and the corresponding node (11, 21).
2、 根据权利要求 1所述的伸缩梯， 其特征在于：  2. The extension ladder of claim 1 wherein:
所述的左锁定机构 (4)还包括：  The left locking mechanism (4) further includes:
连接在横档 (3)左端的左连接套 (41)， 该左连接套 (41)将横档 (3)与相应左节杆 (11)的 上部相互连接；  a left connecting sleeve (41) connected to the left end of the crosspiece (3), the left connecting sleeve (41) interconnecting the crosspiece (3) with the upper portion of the corresponding left joint rod (11);
设于横档 (3)内的左插销 (42)， 该左插销 (42)可相对横档 (3)水平横向移动并能伸出 横档 (3)左侧外部；  a left pin (42) disposed in the crosspiece (3), the left pin (42) is horizontally movable relative to the crosspiece (3) and can extend beyond the left side of the crosspiece (3);
套设在所述的左插销 (42)上、 并使左插销 (42)始终保持外露出横档 (3)左侧外部趋势 的第一弹簧 (43);  a first spring (43) sleeved on the left latch (42) and having the left latch (42) always exposed to the left outer trend of the crosspiece (3);
所述的左操控按钮 (6)与所述的左插销 (42)相连， 对应地， 所述的左节杆 （11)上部 开有供左插销 (42)穿出的第一锁定孔 (111), 左节杆 (Π)的中部也开有供左插销 (42)*** 的第二锁定孔 (112);  The left control button (6) is connected to the left pin (42), and correspondingly, the upper portion of the left node (11) is provided with a first locking hole (111) for the left pin (42) to pass through. ), the middle of the left section lever (Π) also has a second locking hole (112) for the insertion of the left pin (42);
所述的右锁定机构 (5)还包括：  The right locking mechanism (5) further includes:
连接在横档 (3)右端的右连接套 (51 )， 该右连接套 (51)将横档 (3)与相应右节杆 (21)的 上部相互连接；  a right connecting sleeve (51) connected to the right end of the crosspiece (3), the right connecting sleeve (51) interconnecting the crosspiece (3) with the upper portion of the corresponding right joint (21);
设于横档 (3)内的右插销 (52)， 该右插销（52)可相对横档 (3)水平横向移动并能伸出 横档 (3)右侧外部；  a right latch (52) disposed in the crosspiece (3), the right latch (52) is horizontally movable relative to the crosspiece (3) and can extend beyond the right side of the crosspiece (3);
套设在所述的右插销 (52)上、 并使右插销 (52)始终保持外露出横档 (3)右侧外部趋势 的第二弹簧 (53);  a second spring (53) that is sleeved on the right latch (52) and that keeps the right latch (52) exposed to the outside of the right side of the crosspiece (3);
所述的右操控按钮 (7)与该右插销 (52)相连， 对应地， 所述的右节杆 (21)上部开有供 右插销 (52)穿出的第三锁定孔 （211)， 右节杆 (21)的中部也开有供右插销 (52)***的第 四锁定孔 (212)。  The right control button (7) is connected to the right latch (52). Correspondingly, the upper right lever (21) has a third locking hole (211) for the right latch (52) to pass through. A fourth locking hole (212) for the insertion of the right latch (52) is also opened in the middle of the right lever (21).
3、 根据权利要求 2所述的伸缩梯， 其特征在于： 所述的横档 (3)内左侧具有第一弹 簧座 (44)， 所述的左插销 (42)可活动地穿过该第一弹簧座 (44)， 所述的第一弹簧 (43)设于 该第一弹簧座 (44)内， 该第一弹簧 (43)—端抵靠在第一弹簧座 (44)的右侧内壁， 另一端 抵靠在左插销 (42)中部的凸肩 (421)上； 3. The extension ladder according to claim 2, wherein: the left side of the crosspiece (3) has a first spring seat ( 44 ), and the left pin (42) is movable through the a first spring seat (44), the first spring (43) is disposed on In the first spring seat (44), the first spring (43) end abuts against the right inner wall of the first spring seat (44), and the other end abuts against the shoulder of the middle of the left pin (42) (421) )on;
所述的横档 (3)内右侧具有第二弹簧座 (54)， 所述的右插销 (52)可活动地穿过该第二 弹簧座 (54)， 所述的第二弹簧 (53)设于该第二弹簧座 (54)内， 该第二弹簧 (53)—端抵靠在 第二弹簧座 (54)的左侧内壁， 另一端抵靠在右插销 (52)中部的凸肩 (521)上。  The right side of the crosspiece (3) has a second spring seat (54), the right latch (52) is movable through the second spring seat (54), and the second spring (53) Provided in the second spring seat (54), the second spring (53) end abuts against the left inner wall of the second spring seat (54), and the other end abuts against the middle of the right pin (52) On the shoulder (521).
4、 根据权利要求 2所述的伸缩梯， 其特征在于： 所述的横档 (3)内左侧具有左限位 块 (45)， 所述的左插销 (42)可活动地穿过该左限位块 (45)， 且左插销 (42)上间隔固定有二 个与左限位块 (45)端面挡配的挡环 (46)， 所述的二个挡环 (46)位于左限位块 (45)两侧； 所述的横档 (3)内右侧具有右限位块 (55)， 所述的右插销 (52)可活动地穿过该右限位 块（55), 且右插销 (52)上间隔固定有二个与右限位 (55)块端面挡配的挡环 (56)， 所述的 二个挡环 (56)位于右限位块 (55)两侧。  The extension ladder according to claim 2, wherein: the left side of the crosspiece (3) has a left limit block (45), and the left pin (42) is movably passed through the The left limit block (45), and the left latch (42) is fixed with two retaining rings (46) arranged to the end of the left limiting block (45), and the two retaining rings (46) are located at the left Both sides of the limiting block (45); the right side of the crosspiece (3) has a right limiting block (55), and the right latch (52) is movable through the right limiting block (55) And the right latch (52) is fixed with two retaining rings (56) arranged to the end of the right limit (55) block, and the two retaining rings (56) are located at the right limiting block (55) side.
5、 根据权利要求 2所述的伸缩梯， 其特征在于： 所述左节杆 (11)外周面的中部套 设有左限位环 (8)， 该左限位环 (8)位于相邻两节左节杆 (11)之间， 对应地， 所述的左连 接套 (41)具有环形表面， 该环形表面形成套接口 (411), 该套接口 (411)与左节杆 (11)上部 外周紧配， 所述的套接口 (411)内壁上端形成能与左限位环 (8)挡配的内肩胛 (412)， 左连 接套 (41)上还具有供左插销 (42)穿过且与所述的套接口 (411)相贯通的通孔 (413);  The extension ladder according to claim 2, characterized in that: the middle portion of the outer peripheral surface of the left joint rod (11) is provided with a left limit ring (8), and the left limit ring (8) is adjacent to Correspondingly, the left connecting sleeve (11) has an annular surface, the annular surface forming a socket (411), the socket (411) and the left node (11) The upper outer circumference is tightly fitted, and the upper end of the inner wall of the socket (411) forms an inner shoulder sill (412) which can be blocked from the left limit ring (8), and the left connecting sleeve (41) also has a left pin (42) for wearing. a through hole (413) that penetrates through the socket (411);
所述右节杆 (21)外周面的中部套设有右限位环 (9)， 该右限位环 (9)位于相邻两节右 节杆 (21)之间， 对应地， 所述的右连接套 (51)具有环形表面， 该环形表面形成套接 口 （511)， 该套接口 (511)与右节杆 (21)上部外周紧配， 所述的套接口 (511)内壁上端 形成能与右限位环 (9)挡配的内肩胛 (512)， 右连接套 (51)上还具有供右插销 (52)穿过且与 所述的套接口 (511)相贯通的通孔 (513)。  a right limiting ring (9) is disposed in a middle portion of the outer peripheral surface of the right knuckle (21), and the right limiting ring (9) is located between two adjacent right knuckles (21), correspondingly, The right connecting sleeve (51) has an annular surface, the annular surface forming a socket (511), the socket (511) is tightly fitted with the upper outer circumference of the right joint (21), and the upper end of the inner wall of the socket (511) is formed. An inner shoulder sill (512) that can be engaged with the right limit ring (9), and a right through hole (51) also has a through hole for the right pin (52) to pass through and penetrate the socket (511) (513).
6、 根据权利要求 5所述的伸缩梯， 其特征在于： 所述的左限位环 (8)上具有一与所 述的第一锁定孔 (111)相对的第一缺口 (81)， 且所述左限位环 (8)的内壁具有数个凸部 (82), 对应地， 所述的左节杆 (11)中部周壁具有数个供所述的凸部 (82)卡入的孔 (113);  The extension ladder according to claim 5, wherein: the left limiting ring (8) has a first notch (81) opposite to the first locking hole (111), and The inner wall of the left limit ring (8) has a plurality of convex portions (82). Correspondingly, the middle peripheral wall of the left joint rod (11) has a plurality of holes for the convex portion (82) to be engaged. (113);
所述的右限位环 (9)上具有一与所述的第三锁定孔 (211)相对的第二缺口 (91)， 且所 述右限位环 (9)的内壁具有数个凸部 (92)， 对应地， 所述的右节杆 (21)中部周壁具有数个 供所述的凸部 (92)卡入的孔 (213)。  The right limiting ring (9) has a second notch (91) opposite to the third locking hole (211), and the inner wall of the right limiting ring (9) has a plurality of convex portions (92) Correspondingly, the middle peripheral wall of the right throttle (21) has a plurality of holes (213) into which the convex portions (92) are engaged.
7、 根据权利要求 1〜6中任一权利要求所述的伸缩梯， 其特征在于： 所述的左节杆 (11)下端开口处套设有一左管套 (10)， 该左管套 (10)的上部外表面 (101)与下一节的左节 杆 (11)内端面接触， 所述的左管套 (10)的下部外表面 (102)呈锥形；  The extension ladder according to any one of claims 1 to 6, wherein: a left sleeve (10) is disposed at a lower end opening of the left joint rod (11), and the left sleeve ( The upper outer surface (101) of 10) is in contact with the inner end surface of the left joint rod (11) of the next section, and the lower outer surface (102) of the left sleeve (10) is tapered;
所述的右节杆 (21)下端开口处套设有一右管套 (12)， 该右管套 (12)的上部外表面 (121)与下一节的右节杆 (21)内端面接触， 所述的右管套 (12)的下部外表面 (122)呈锥形。  a right sleeve (12) is sleeved at a lower end opening of the right joint rod (21), and an upper outer surface (121) of the right sleeve (12) is in contact with an inner end surface of the right joint rod (21) of the next section. The lower outer surface (122) of the right sleeve (12) is tapered.
8、 根据权利要求 7所述的伸缩梯， 其特征在于： 所述的左管套 (10)的上部内表面 具有数个凸点 (103)， 对应地， 所述的左节杆 (11)下部周壁具有数个供所述的凸点 (103) 卡入的定位孔 (114); The extension ladder according to claim 7, wherein: the upper inner surface of the left sleeve (10) has a plurality of bumps (103), and correspondingly, the left joint (11) The lower peripheral wall has a plurality of bumps for said (103) Locating hole (114);
所述的右管套 (12)的上部内表面具有数个凸点 (123)， 对应地， 所述的右节杆 (21)下 部周壁具有数个供所述的凸点 (123)卡入的定位孔 (214)。  The upper inner surface of the right sleeve (12) has a plurality of bumps (123). Correspondingly, the lower peripheral wall of the right joint (21) has a plurality of hooks for the bumps (123). Positioning hole (214).
9、 根据权利要求 1所述的伸缩梯， 其特征在于： 所述的左操控按钮 (7)的右侧具有 便于指尖搭设的挡部 (71); 所述的右操控按钮 (8)的左侧具有便于指尖搭设的挡部 (81)。  9. The extension ladder according to claim 1, wherein: the right side of the left control button (7) has a stop portion (71) for facilitating the fingertip erection; the right control button (8) The left side has a stop (81) for easy fingertip erection.
PCT/CN2009/000792 2008-08-14 2009-07-14 Extending ladder WO2010017684A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK09806287.0T DK2322752T3 (en) 2008-08-14 2009-07-14 EXCEPTIONAL RISES
EP09806287.0A EP2322752B1 (en) 2008-08-14 2009-07-14 Extending ladder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200820162785.2 2008-08-14
CNU2008201627852U CN201250602Y (en) 2008-08-14 2008-08-14 Extension ladder

Publications (1)

Publication Number Publication Date
WO2010017684A1 true WO2010017684A1 (en) 2010-02-18

Family

ID=40746276

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2009/000792 WO2010017684A1 (en) 2008-08-14 2009-07-14 Extending ladder

Country Status (4)

Country Link
EP (1) EP2322752B1 (en)
CN (1) CN201250602Y (en)
DK (1) DK2322752T3 (en)
WO (1) WO2010017684A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013181343A (en) * 2012-03-02 2013-09-12 Alinco Inc Expansion leg lock device for work bench

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338649B (en) * 2008-08-14 2011-02-09 王万兴 Telescopic ladder
CN201250602Y (en) * 2008-08-14 2009-06-03 王万兴 Extension ladder
US10207881B2 (en) 2016-10-31 2019-02-19 Horizon Global Americas Inc. Telescoping ramp

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527766B1 (en) 1990-04-10 1996-06-05 Bertschi, Bruno Collapsible ladder
US7048094B2 (en) 2002-08-02 2006-05-23 Core Distribution, Inc. Extending ladder and associated manufacturing methods
CN2881052Y (en) * 2006-02-08 2007-03-21 何海涛 Telescopic ladder
CN200971751Y (en) * 2006-10-30 2007-11-07 范刚 Locking device for telescopic lalder
CN201047247Y (en) * 2007-04-23 2008-04-16 简世坤 Telescopic ladder
CN201250602Y (en) * 2008-08-14 2009-06-03 王万兴 Extension ladder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1712942A (en) * 1927-12-29 1929-05-14 Hiram K Smith Collapsible ladder
GB8717884D0 (en) * 1987-07-28 1987-09-03 Baker M R E Folding ladders
GB9403863D0 (en) * 1994-03-01 1994-04-20 Foxdale Dev Ltd Extensible ladder
GB2436584B (en) * 2006-03-30 2011-08-31 Norman William Liefke An extension ladder with improved mechanism
US7967110B2 (en) * 2006-07-27 2011-06-28 Werner Co. Tubular access ladder and method
CN200985738Y (en) * 2006-11-27 2007-12-05 苏正平 Telescopic ladder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527766B1 (en) 1990-04-10 1996-06-05 Bertschi, Bruno Collapsible ladder
US7048094B2 (en) 2002-08-02 2006-05-23 Core Distribution, Inc. Extending ladder and associated manufacturing methods
CN2881052Y (en) * 2006-02-08 2007-03-21 何海涛 Telescopic ladder
CN200971751Y (en) * 2006-10-30 2007-11-07 范刚 Locking device for telescopic lalder
CN201047247Y (en) * 2007-04-23 2008-04-16 简世坤 Telescopic ladder
CN201250602Y (en) * 2008-08-14 2009-06-03 王万兴 Extension ladder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2322752A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013181343A (en) * 2012-03-02 2013-09-12 Alinco Inc Expansion leg lock device for work bench

Also Published As

Publication number Publication date
EP2322752B1 (en) 2013-05-29
CN201250602Y (en) 2009-06-03
EP2322752A4 (en) 2012-09-12
DK2322752T3 (en) 2013-08-26
EP2322752A1 (en) 2011-05-18

Similar Documents

Publication Publication Date Title
JP4898795B2 (en) Ladder locking device
US9103368B2 (en) Locking hinge mechanism for a collapsible play yard frame
WO2010034135A1 (en) An extension ladder
WO2012055159A1 (en) Locking structure for extensionableladder
RU2536227C1 (en) Playing ground latching at corners
CA2080135C (en) Collapsible ladder
WO2008064532A1 (en) An extensible ladder with anti-pinch device
US5036873A (en) Adjustable crutch assembly
CA2640296A1 (en) Collapsible stepladder
WO2010017684A1 (en) Extending ladder
ITVR20010022A1 (en) FOLDING UMBRELLA FRAME, PARTICULARLY FOR STROLLERS
WO2008123874A1 (en) Foldable stepladder with step lock
WO2018129982A1 (en) Slow descending mechanism of telescopic ladder
WO2017215271A1 (en) Telescopic ladder
CN106004969A (en) Baby carriage frame
CN202348099U (en) Extending ladder
CN201504863U (en) Bottom frame center connection locking piece of folding bed
CN2934003Y (en) Baby carriage folding safety lock device
US20140318893A1 (en) Collapsible ladder
CN209421520U (en) A kind of children's bed body folds gathering mechanism and its play yard
CN209421519U (en) It is a kind of to fold the children's bedside bed mechanism for collapsing function with bed body
CN206217962U (en) A kind of baby stroller from locking
CN200985738Y (en) Telescopic ladder
CN207484930U (en) Foldable scaffold
CN207484929U (en) Scaffold guard rail

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09806287

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2009806287

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE